Adobe 23101335 User Guide - Page 346
Deleting colors from the color table, Loading and saving color tables
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336 CHAPTER 12 Optimizing Images for the Web Deleting colors from the color table You can delete selected colors from the color table to decrease the image file size. When you delete a color, areas of the optimized image that previously included that color are rerendered using the closest color remaining in the palette. When you delete a color, the color table automatically changes to a Custom palette. This is because the Adaptive, Perceptual, and Selective palettes automatically add the deleted color back into the palette when you reoptimize the image-the Custom palette does not change when you reoptimize the image. To delete selected colors: 1 Select one or more colors in the color table. (See "Selecting colors" on page 333.) 2 Delete the color: • Click on the Trash button ( ). • Choose Delete Color from the Color Table palette menu. Loading and saving color tables You can save color tables from optimized images to use with other images and to load color tables created in other applications. Once you load a new color table into an image, the colors in the optimized image are changed to reflect the colors in the new color table. To save a color table: 1 Select Save Color Table from the Color Table palette menu. 2 Name the color table and choose a location where it will be saved. By default, the color table file is given the extension .act (for Adobe Color Table). If you want to access the color table when selecting Optimization options for a GIF or PNG image, save the color table in the Optimized Colors folder, inside the Presets folder in the Adobe Photoshop folder. 3 Click Save. To load a color table: 1 Select Load Color Table from the Color Table palette menu. 2 Navigate to a file containing the color table you want to load-either an Adobe Color Table (.act) file, or a GIF file (to load the file's embedded color table). 3 Click Open. Using master palettes (ImageReady) You can create a master palette to use with a group of GIF or PNG-8 images that will be placed on a CD-ROM or other multimedia storage medium. When you include the master palette with a batch of images, all images display using the same colors.